Roller bit



G. E. BEHNKE ROLLER BIT Jan. 29, 1935.

Drginl,Filed Dec. 1, 1932 Gay E; Behntre INVENTOR.

BY v fi- VA-I: un

ATTORNEY.

Patentecl Jan. 29, 1935 UNITED STATES nosa2u nonna nrr Gay E. Behnke, Oklahoma. City, O:1a., ansima: a: Reed Boiler Bit Company, Hourton, Tex., .a.

corporation of Texas Original applcation December I 1932, Serial No.

654,143. Divided ami thls 27, 1934, Serial No. 741,624

3 Claims.

Ths invention relates generally to deep .well drilling apparatus, and speciflcally to roller bits. the present application being a division of my application Serial Number 654,143, flled December 1, 1932, which has matured into PatentNumber 1.972,256, granted September 4, 1934.

The invent ion disclosed by the present applica tion has for its object the provision of nev and improved bearings tor roller cutters, and will be found particularly useful in that conventional type of roller bit including a. head having a substantially V-shaped cutter recess in the bottom thereof, and substantialLv conical cutters in said recess.

A specific object of this invention is the provision of new and improved means whereby three rows of balls may be efficiently utilized to supportand rotatably secure a cone cutter in bits of thetype referred to.

The preferred embodiment 01' the invention is illustrated by the accompanying drawing, 01' which Fig. 1 is a partly sectional side elevation, and Fig. 2 is a detail view taken at a right angle to Fig. 1.

In the drawing the bit head isindicated ai. 1. It has in its lower end a substantially V-shaped recess 2 for the reception 01' the substantially conical roller cutters 3. Bach of these cutters is mounted in the head by means whii:h w'ill now bedescribed.

In the wall 01 the recess is a downwardly opening slot 4 for the reception 01 a cutter support 5 which may be removably we lded therein. The

support 5 has an opening 6 to receive the cutter pin 1, which may be removably wel ded therein, 'and an annular flange 8 projecting downwardly and inwardly into the recess 2 and surrounding the pin 7. The pin 7 has an annular flange 9, and disposed between the support flange 8 and the pin flange 9 is a removable ring 10. The support flange 8 and removable ring 10 form a raceway tor balls 11 in raceway 12 or cutter 3. The removable ring 10 and flange 9 forni a. raceway for the bal1s 13 in the raceway 14 of the cutter 3.

- The flange 9 forma a raeeway for the balls 15 in the raceway 16 of the cutter 3.

The advantages of this bearing oonsfiuction will be apperent to thoee skilled in the art.

application Auguri;

' I claim:

1. A roller bit having a head, said head having a cutter recess, a support removably secured to said head, 9. pin removably secured tu said support, and a cup-shaped cutter enclosing said pin, said support having an annular flange surrounding said pin and projecting downwrdly and inwardly into said recess, a ring on said pin and having rounded opposite sides and bearing against the flange of said supporta, said pin having an 10 annular flange bearing against said ring, said pin flange having rounded portions on its apposite sides. said support flange ami ring forming a flrst hall raceway, said ring and pin flange forming a second hall 'raceway, and said pin and pin 15 flange forming a third baii raceway, said cutter having flrst, second and third hall raceways, a.nd balls in said raceways to Iorm a bearing and to rotatably iock said cutter on said pin.

2. A roller bit having a supporta, a pin remov- 20 ably secured to said support, and a cup-shaped cutter enclmsing said pin, said support having a,n annular flange surrounding said pin, 9. ring on said pin ami having rounded apposite sides ami bearing against the flange o! said support, said pin having a.n annular flange bearing against said ring, said pin flange having rounded portions on its W081te sides, said support flange y and ring forming a flrst hall raceway, said ring end pin flange torming.a second hall raeeway. 80 and said pin ami pin flange forming athird hall V raceway. sa.id cutter having flrst, second ami third hall raeeways, and balla in said raceways to iorm a bearing and to rotatably look said cutter on 8816 pin.

3. A roiier bit having a support, a pin removably securedto said support, and a. cup-shaped cutter enclosing said pin, said support having an annuiar flange surrounding said pin, a ring on said pin and bearing against the flange o! said 40 support, said pin having an annularflange bear- D8 ainst said ring. said supporir flange ami ringformingaflratballracewnwandsaid ring and pin flange forming a second bai! raceway, raid cutter having flrst a.nd a.scond bai] race- 4! ways,andbalisinsaidracewa'ystotormabearinzandtorotatablyiooksaidcutteronsaidpin GUYE.ENKE. 

